O-Bin, frequently called Bin, served as a Teaching Guide within the Learning Circle located on the world of Kegan during the reigns of V-Tan and O-Vieve. She maintained a rigorous approach with all her students, most notably Obi-Wan Kenobi and Siri Tachi. O-Bin typically kept her hair tightly drawn back, revealing her ears, and she favored a standard brown tunic paired with black pants.